28868767 has 4 divisors (see below), whose sum is σ = 29046040. Its totient is φ = 28691496.

The previous prime is 28868761. The next prime is 28868773. The reversal of 28868767 is 76786882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76786882 = 2 ⋅38393441.

It is an interprime number because it is at equal distance from previous prime (28868761) and next prime (28868773).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28868767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28868761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88392 + ... + 88717.

It is an arithmetic number, because the mean of its divisors is an integer number (7261510).

Almost surely, 2^28868767 is an apocalyptic number.

28868767 is a deficient number, since it is larger than the sum of its proper divisors (177273).

28868767 is a wasteful number, since it uses less digits than its factorization.

28868767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177272.

The product of its digits is 1806336, while the sum is 52.

The square root of 28868767 is about 5372.9663129411. The cubic root of 28868767 is about 306.7675457081.

The spelling of 28868767 in words is "twenty-eight million, eight hundred sixty-eight thousand, seven hundred sixty-seven".